Bushing.



1].. J. BELL & 0. TREIBER.

BUSHING. APPLICATION I ILBD FEB- 27, 1912.

1,091,1 1'3. Patented Mar. 24, 1914.

Fig.1.

COLUMBIA PLANOGRM'H cp.,wASmNGToN. u. c.

UNITED STATES PATENT OFFICE.

ERNST JULIUS BELL AND OSCAR TREIBER, OF FOCI-IE, NEAR SOLINGEN, GERMANY,

ASSIGNORS TO VEREINIGTE WALZ- FRIEDR. BOECKER PI-IS SOHN & CO. GERMANY.

UND RClHRENWER-KE ACT.GES. VORMALS UND FRLEDR. KOENIG, OF I-IOHENLIMBURG,

BUSHING.

Specification of Letters Patent.

Patented Mar. 24, 1914.

Application filed February 27, 1912. Serial No, 680,359.

To all whom it may concern Be it known that we, ERNST JULIUS BELL and OSCAR TREIBER, both subjects of the German Emperor, residing at F oche, near Solingen, Germany, have inventeda new and useful Bushing, of which the following is a specification.

This invention relates to a bushing which is composed of vulcanized fiber and is so constituted that its manufacture is facilitated while an accurate fit, together with great strength and smoothness is insured.

In the accompanying drawing: Figure 1 is a side view of a bushing embodying our invention, showing part of the rib cut away; Fig. 2 a longitudinal section thereof, and Fig. 3 an end view. 1

In making the bushing, vulcanized fiber is reduced to fine sheets and the latter are wrapped around a smooth cylindrical mandrel and if necessary rolled thereon, so that the several layers will lie closely against each other. These layers are then joined or fused together by a vulcanizing process or in similar manner, to form a tube. This tube is sawed lengthwise in two, along its center to form a pair of trough-shaped or semi-tubular pillows 10, 11 which will permanently retain their shape. In as much as by the wrapping of the sheets around the mandrel, the single fibers thereof will come to lie in curves concentric to the shaft, the bushing will present a running surface of superior smoothness so that friction is reduced to a minimum.

The upper pillow 11, is provided withan openmg 12, through which the lubricant can reach the shaft. Alon the longitudinal edges of pillows 10, 11, there extend a pair of rlbs 13, which are provided with spacing lugs 14, entering corresponding recesses 15 formed in said edges. The thickness of the lugs 14 is such that they slightly spread the pillows as at 17, and thus compensate for the material removed by the saw while cutting the fiber tube into two. In this way the bearing is restored to its original circular cross section, while the lugs furthermore constitute means for preventing a relative axial displacement of the pillows. The ribs 13 are provided with apertures 16 adapted for the reception of pins by means of which the bushing is fitted into a surrounding shell (not shown).

We claim:

A bushing comprising a pair of semitubular pillows having notched longitudinal edges and formed of fibers curved concentric to the bearing surface of the pillows, and a pair of ribs extending along said edges and having spacing lugs that engage the edge-notches, said spacing lugs being of a thickness to spread the pillows along such edges.

ERNST JULIUs BELL. OSCAR TREIBER.

Witnesses:

HELEN NUFER, ALBERT NUFER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

